Improvement in mechanisms for folding paper



UNITED STATES PATENT OFFICE.

LUTHER O. GROWELL, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN -MECHANISMS FOR FOLDING PAPER.

Specification forming part of Letters Patent No. 181,250, dated August 22, 1876; application filed April 3, 1876.

-To all whom it may concern:

. mechanism to deliver one-half of the sheet upon the other half, the sheets so lapped being pasted at intervals, if desired, after which itis folded; and the invention also consists in a new method of lapping paper to be folded by folding mechanism.

Figure 1 represents a portion of a perfecting-press with my improvements added. Fig. 2 is a top view thereof. Fig. 3 is a front view of the guide. Fig. 4 is a detail of the pasting device Fig. 5, a modification of the guide. Fig. 6 represents a sheet of paper as delivered from the cylinder,'showing printed and unprinted portions; and Fig. 7 represents the guide at separate.

The cylinder at is covered with cloth, and is one of the usual impression-cylinders, and opposed to it is the type-cylinder b, the web of paper 0 being supplied, in this instance, froma r0ll, d, herein shown as located near the impression-cylinder.

In this instance of my invention the web is of a width to produce a quarto or double-sheet posite the cutter. One-half, 4, of this web is passed up over the firstfcylinder j, and then under the second cylinder of the pair of fold- This printed web is.

ing-cylinders, provided with blades and jaws and cutters to fold and sever the sheet transversely on the alternate lines 2, Fig. 6, such mechanism being fully described in an application filed by me in the United States Patent Office November 11, 1875, and the portions2 remaining uncut, serving as the line on which the completed paper is folded from top to bottom, or the white central portion parallel with the length of the columns. The other half, 5,, of the web is led down over a leading-roller, Z, and about a guide, m, composed, as shown in Figs. 1, 3, and 7 of a V-shaped frame, preferably clad at its edges with sheet metal, formed as cones, the ends of largest diameter being nearest the leading-roller, and the smaller ends coming substantially together at n. The metallic edges are shown in dotted lines, Fig. 3. It will be noticed the portion 5 passes in Fig. 3 down in front of the guide; then back about the left-hand edge; then across the back of the guide, as shown by the dotted arrow; then around the other edge, up in front of the 'guide, and under and then over the roller}, where it is delivered against the under side of portion 4-., WithjitS outer edge 6 at the center of the machine, and substantially parallel with the inner edge of the portion 4,

and in this way the folding-cylinders are made to operate on a web composed of two thicknesses of paper, instead .of one, as usual, and I am enabled to manipulate a broad sheet for a quarto paper as readily as if the sheet was narrow, as usual with newspapers known as single-sheet.

The impression-cylinder has affixed to its cloth or felt cover, at intervals from its center to one end, a number of paste-appliers, consisting, in this instance of my invention, of pieces 0 of sheet metal, of the form shown in Fig. 4, the barbed or hooked ends 19 passing through the cloth covering, and the flat ends 7, at each rotation of the impression-cylinder, Wipe over and against the surface of a roller revolving in a paste-trough, 0. These pasteappliers 0 act to deliver spots of'paste or gum on each alternate unprinted portion 2 and at the under side of the half 4 of the web, and when the half 5 is laid against the under side of half 4, as described, the paste or gum causes the parts 4 5 to adhere together on each alternate line 2, this paste serving to keep the twosheets together at their centers, the two sheets forming the folded paper, and the quarto paper, delivered as described, will have its two sheets attached at their centers parallel with the length of the printed columns, and all the edges of the paper will be cut ready'to be opened as the leaves of a book.

The cutter'shaft 8 will be driven by a belt or gear in any suitable way, and from any proper moving part of the machine, and its carrying-arms will be arranged to move toward or from the roller 1', to sharpen the cutter, or

for purposes of adjustment.

Instead of the guide m, constructed as.

shown in Figs. 1 and 3, I may place a cylindrical guide, .9, diagonally across the entire sheet 0, and lead theportion 5 backward around under and up over it, and then to the under side of portion 4, as before described.

I am not aware that a web of paper has ever been split on the press orfolding-machine, and delivered one-half under the other half, to

' be subsequently fo1ded,.as herein described,

and I do not, therefore, intend to limit myiu vention to the exact devices described, as

many equivalents for each 0 the partsmay be i made. I claim- 1. The combination of the bed-roller and a cutter with a guide, substantially as described, to conduct one portion of the severed web laterally and against the other portion.

2. The bed-roller and cutter, in combination: a

with a leading-roller and the guide, to deliver onepart of the severed web laterally and against the other" part, substantially aswde scribed.

3. In a perfectin g-press, providedwitliprinting and impression cylinders, the combination, with a cutter and bed-roller, of a guide, substantially as described, to carry laterally, and to lap,.one portion of the severed web over against the other portion,substantially as described.

4. The combination, with the impressioncylinder, of paste-appliers 0, attached to the cover of the impression-cylinder, and adapted to apply paste to portions of theweb to be subsequently folded, substantially as described.

5. The combination of the mechanism to paste and mechanism tofsever the web longi tudin-ally' with a guide, sanspanuany as" described, to directthe portion ofthe severedjweb longitudinally and against the pasted surface of the other portion,substantially as set farm:

6. The method" hereindescribed of folding paper in a printing-presses folding machine, consisting in automatically severingthe web longitudinally, and then" d'irecting one "of the severed portions laterally" and against and in contact with the othersevered portion, to {be subsequently severed; transversely andTold-ed',

substantiallyas-set forth. p

In testimony whereof I have signed my name to this specification in thepresenceof two subscribing witnesses.

LUTHER O. OROWELL.

Witnesses: l

G. W. GREGORY, W. J. PRATT. 

